We are providing today's gas installers and end users with a practical and low cost option to lower onsite carbon without the need for expensive remedial works. Rinnai water heaters are hydrogen blend and bio-LPG ready with I2HY20 certification (up to 20% hydrogen gas blends) meaning that when hydrogen blends enter the grid, the fleet of Rinnai hot water heating units will produce even less carbon.
There are ambitions for 100% hydrogen being available by the mid-2030s, therefore we are launching a wide range of newly certified Rinnai condensing continuous flow water heaters with an extended warranty of 12 years, along with hydrogen ready boilers and light commercial hot water systems.
Rinnai commercial water heaters come with stainless steel heat exchangers ensuring extended operational performance across multiple forms of fuels, including when a blend of hydrogen is added to the UK gas infrastructure.
Read more about our 100% hydrogen combustion technology at Hydrogen Sustainability.
Optimum performance water heaters with advanced developments in gaseous fuel options
Rinnai hot water heaters are proven to lower onsite carbon by up to 30% when replacing gas-fired storage systems. To validate this, Rinnai offer free design support services that include capital and operational expenditure and carbon modeling of multiple water heating technologies across all future energy sources.
To use this free of charge service, contact us today: Help me choose a product.
Rinnai hydrogen blend-ready water heaters have a market-leading efficiency of 97% in the water heating industry and a modulation range of 13-1 due to the Rinnai patented advanced burner control ensuring that gas is only used when needed. These core product functions are supported by scale protection to promote lifetime efficiency and remote monitoring connectivity to ensure the system is always running at its optimum.
Rinnai natural gas, hydrogen blend ready, LPG and renewable gas-ready units hot water products are “high output” capable of more than 1500 litres per hour (load profile XXL) of temperature-accurate hot water, making them a feasible solution for commercial usage.
Rinnai hot water heating technology can be cascaded to create limitless supply for even the heaviest industrial process needs. The energy efficient commercial condensing range only produces small amounts of NOx (27mg /kW) max, meaning that they are one of the cleanest combusting condensing water heaters in the world.
Find out more about the Rinnai range of condensing water heaters today at Hydrogen blend ready and BioLPG ready condensing water heaters.
The extensive range light commercial and domestic hot water solutions can supply up to 1000 litres per hour whilst also being some of the lightest water heaters available.
Find out more about the Rinnai range of light commercial and domestic water heaters at Domestic Water Heaters | bioLPG | Hydrogen Ready | Heat Pumps.
To enquire about any of these products follow this link: Ask us a question.
To support the ongoing energy transition, Rinnai can supply hydrogen, hydrogen blend ready boilers and renewable gas ready commercial water heaters, residential water heaters, retrofittable hybrid solar, and low-GWP heat pump hybrids along with standalone heat pump technology, condensing water heater, LPG water heater & hydrogen ready gas boilers.
The integral controls within each appliance enables advanced monitoring. Users can benefit from the cutting-edge functionality inherent within our proprietary water heating technology.
The inbuilt controls inherent in the Rinnai hot water heater range ensure that users will have full control over their hot water provision. The preset temperature set by the user is accurate to one degree of the set-point ensuring comfort and safety.
We can include design service support to assisting in calculating the optimum carbon savings and maximise carbon footprint reduction. Free training and CIBSE certified CPDs are also provided free of charge.
For more details of the wide variety of appliances within the Rinnai UK product range see below.
Domestic and Light Commercial Hydrogen Blend and Bio-LPG Ready Technology
Domestic Tankless Multipoint Gas Water Heaters
Technological Innovation in Commercial Gas Water Heating
Commercial Continuous Flow Gas Water Heaters
Renewable Solar and Heat Pump Technology
Renewable water heating solutions from Rinnai
Reduce energy usage with Rinnai solar thermal: Rinnai Low Carbon heating solutions
Learn about Rinnai low-GWP heat pump technology: Commercial Air Source Heat Pump Technology
Innovative Electric Water Heaters
Rinnai also have a range advanced electrical instant water heaters that can be used as a high efficiency standalone water heater or part of a wider hybrid system. For more information of our wide range of product offers see below:
Electric storage water heaters
Electric instant water heaters
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Updated Mar 2025